Astronomy Picture of the Day

                         Astronomy Picture of the Day

    Discover the cosmos! [1] Each day a different image or photograph of our
 fascinating universe is featured, along with a brief explanation written by a
                           professional astronomer.

                                  2019 May 30
                                      [2]
                        Sunrise at Copernicus Crater
                 Image Credit & Copyright [3] : Sage Gray [4]

Explanation: A prominent impact site [5] anchored in the lunar Oceanus
Procellarum, Copernicus crater is at the center of this telescopic portrait in
light and shadow [6] . Caught in stacked and sharpened video frames recorded
on April 14 at 3:30am UTC, the lunar terminator, or boundary between night and
day, cuts across the middle of the 93 kilometer diameter crater. Sunlight is
just beginning to strike its tall western walls but doesn't yet shine on lower
terrain nearby, briefly extending the crater's outline into the lunar
nightside. At that moment standing at Copernicus crater [7]  you could watch
the sunrise, an event [8]  that happens at Copernicus every 29.5 days. Of
course that corresponds to a lunar month or a lunation, the time between
consecutive Full Moons, as seen from planet Earth [9] .

                      Tomorrow's picture: pixels in space

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    Authors & editors: Robert Nemiroff [21] (MTU [22] ) & Jerry Bonnell [23]
                                  (UMCP [24] )
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Site notes:
  [1] archivepix.html
  [2] image/1905/SunriseCopernicus.jpg
  [3] lib/about_apod.html#srapply
  [4] mailto: sage gray photography [at] gmail [dot] com
  [5] http://lroc.sese.asu.edu/posts/675
  [6] ap180414.html
  [7] https://lunarscience.nasa.gov/articles/
iconic-lunar-orbiter-image-of-copernicus-re-released/
  [8] https://www.physlink.com/education/askexperts/ae616.cfm
  [9] ap180912.html
  [10] ap190529.html
  [11] archivepix.html
  [12] lib/apsubmit2015.html
  [13] lib/aptree.html
  [14] http://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  [15] calendar/allyears.html
  [16] /apod.rss
  [17] lib/edlinks.html
  [18] lib/about_apod.html
  [19] http://asterisk.apod.com/discuss_apod.php?date=190530
  [20] ap190531.html
  [21] http://www.phy.mtu.edu/faculty/Nemiroff.html
  [22] http://www.phy.mtu.edu/
  [23] http://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  [24] http://www.astro.umd.edu/
  [25] lib/about_apod.html#srapply
  [26] http://www.nasa.gov/about/highlights/HP_Privacy.html
  [27] http://astrophysics.gsfc.nasa.gov/
  [28] http://www.nasa.gov/
  [29] http://www.nasa.gov/centers/goddard/
  [30] http://www.mtu.edu/

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